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- 2018
利用模拟退火算法反演多波束测量声速剖面
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Abstract:
针对多波束测量声速剖面站点布设密度不够而引起的声速剖面代表性误差问题，提出一种利用模拟退火算法反演声速剖面的方法。首先，对测区已有声速剖面序列进行经验正交函数（empirical orthogonal function，EOF）分析，利用声速扰动矩阵和前几阶EOF求得EOF重构系数及其变化范围。其次，采用模拟退火算法对EOF重构系数进行迭代优化，以多波束测得的海底地形畸变量大小为依据构建目标函数，并设定合理的退火控制参数。最后，得到待反演区域的声速剖面数据。实例分析表明，该方法反演的声速剖面较时间就近原则选取的替代声速剖面更接近真实声速剖面，且利用反演声速剖面改正后的海底地形更接近真实地形，有效削弱了声速剖面代表性误差的影响，显著提高了多波束测量精度及数据处理效率
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